HTML 5.1

W3C Recommendation, 1 November 2016

Table of Contents

Acknowledgements

Thanks to Tim Berners-Lee for inventing HTML, without which none of this would exist, Dan Connolly,
the many who worked to standardise HTML over the last couple of decades or so, and the many more who
worked on ideas subsequently incorporated into HTML.

For inestimable work, and the drive to keep HTML up to date, particular thanks are due to Ian Hickson,
and the other editors of the WHATWG: Anne van Kesteren, Domenic Denicola, Philip Jägenstedt,
Simon Pieters.

Thanks to the participants of the Responsive Images Community Group and the WHATWG for helping to develop the picture element, the srcset attribute,
and the sizes attribute. Special thanks to Bruce Lawson for originally suggesting,
Edward O’Connor and Ian Hickson for writing the original srcset specification, and Adrian Bateman
for providing the group with guidance. Contributions also from: David Newton, Ilya Grigorik,
John Schoenick, and Leon de Rijke.

With apologies to people who have undeservedly not been named, thanks to